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Ocean atmosphere accelerated test method for aluminum alloy materials

2022-12-23

Aluminum alloy materials are widely used in marine and atmospheric environments, and their corrosion problems have become more prominent in the context of marine resource development. The corrosion resistance of aluminum alloy materials in marine and atmospheric environments has been evaluated by indoor accelerated corrosion testing. Sex is of great importance to shipbuilding.

Xing Shibo of Beijing University of Science and Technology and others have extensively studied the LF2 aluminum alloy and the 7A04 aluminum alloy in Xisha hard

Lab

Corrosion behavior of natural exposure to the marine atmospheric environment, environmental spectrum compilation and accelerated indoor corrosion test, the correlation between exposure to the natural environment and accelerated indoor corrosion test was analyzed, and the periodic infiltration compound was established. Accelerated Corrosion test and continuous salt spray composite accelerated corrosion test are two indoor accelerated corrosion test methods with good correlation.

The indoor accelerated corrosion test obtained the corrosion kinetics from the indoor accelerated corrosion test of two aluminum alloys. The periodic infiltration composite accelerated corrosion test: LF2 aluminum alloy is W=0.5329t0.4735, 7A04 aluminum alloy is W=12.762t0.1892; Continuous salt spray composite accelerated corrosion test: W=0.4539t0.4856 for LF2 aluminum alloy, W=11.595t0.1944 for 7A04 aluminum alloy. In addition, the accelerated indoor corrosion test and Xisha Correlation rate of corrosion kinetics between exposure to a harsh marine atmospheric environment. The results show that the correlation degree of inner and outer corrosion kinetics of LF2 aluminum alloy and 7A04 aluminum alloy is greater than 0.6. Corrosion kinetics have a good correlation.

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